Feed-water heater.



PATENTED JULY 14, 1908.

J. EOSEMEYEE. EEED WATER EEATEE.

APPLIOATION FILED JAN. 9, 1908.

j 'El l w lll/ll Il eases:

' Allmmey-l ED STABS PTE FEED-WATER HEATER.

Application led January 9,1908.

To all whom it may concern.'

Be it known that I, JOSEF RosEMEYER, a subject of the King of Prussia, German Emperor, residing at Lindenthal, near Cologneon-the-Rhine, in the Province of the Rhine, Kingdom of Prussia, German Empire, have invented a certain Feed-Vater Heater, of which the following is a specification.

This invention relates to a feed. water heater with several annular water and heating spaces placed one Within the other, and consists firstly in the provision at they head of these spaces of large water spaces. By this means it becomes possible to heat during the stoppage of the feed large quantities' of water and thereby to prevent the forming of steam as much as possible and to diminish the formation of scale.

In the constructions of feed water heaters already known there is only provided a relatively small water space and the entire water is very highly heated during the time when it is not necessary to supply the boiler so that a formation of steam is unavoidable. At the moment of the feed on the other hand, this small quantity of highly heated water runs rapidly out and the freshly pumped water which is at a low temperature, can no longer be so quickly heated, so that an effective utilization of the steam heat is not possible. On the other hand it is more economical to accommodate as large a bulk of water as possible in the preliminary heater, which water is well warmed during the time when the boiler is not being supplied and the quick excessive heating of the water, and especially the formation of steam, is avoided as much as possible, in order to secure a more constant water temperature during the feeding. This has simultaneously the result of restricting the formation of scale.

The great water spaces are arranged in the upper part of the single bell-shaped pre-heating chambers or cylinders, because here a specially great heating occurs in consequence of the increased heating surfaces.

A further characteristic of the present heating apparatus consists in that the outermost annular space is a water space in which only the cold water enters. The already known heaters of similar construction have the drawback that within the outer space the Specification of Letters Patent.

Patented July 14, 1908.

serial No. 409,998.

present invention on the other hand there circulates in the outermost space always water at a low temperature so that no nonconducting covering is necessary. Moreover the heater is constructed on the well known opposed current principle.

A special advantage is further to be recognized in that the removal of the scale can be effected very simply and practically, if the single concentric divisions are unscrewed from their bed-plate and lifted up. By this means, all the surfaces which are exposed to the formation of scale can be made easily accessible. The arrangement of ribs, which on account of the large amount of space giving off heat, become unnecessary, is avoided in the water spaces in view of the more easy removal of scale.

The drawing shows the new feed water heater in one construction in axial longitudinal section.

The steam enters at a, rises in the innermost cylinder b, passes above in the direction indicated by the arrow through openings into the annular space e, passes down through this, then through the openings f into the space g and rises in it escaping through the outlet 7L from the heater. The Water enters at i, rises in the tube c and fiows above into the large water space Z, which is inclosed to the outside by means of the partition m. The water, in contradistinction to the direction of the steam, is arranged to flow downwards g it passes through the openings n into the annular space 0, passes above through the openings p, into the space q, and escapes underneath at r from the heating apparatus in a highly heated state.

In order to effect the cleansing of the device from scale, the outermost cover m is first removed, then successively the covers s and t. In order to reach the space q, the central part, which still stands, is then unfastened from the bed-plate u, whereby also the space g is rendered easily accessible.

Having now particularly described my said invention, l declare that what l claim is:

Feed water heater comprising a baseplate and outer closed shell secured thereto, an inner hollow body, built up of three concentric walls to form a central space l) and an outer annular space e for steam and an intermediate annular space g for water, flanges at the lower edges of the outer and the middle wall of said hollow body adapted to form seats for inverted bell sha ed oasings, a closed bell t secured to the ange of the outside Wall and a bell s open at the top and traversing the outer shell secured to the flange of the middle Wall of the inner body, forming suitable assages for the steam and. Water substantial y as described and for the purpose set forth.

In testimony, whereof I have signed my name to this. specification in the presence of 10l two subsorlblng Witnesses.

JOSEF ROSEMEYER.

Witnesses:

BEssIE F. DUNLAP, LOUIS VANDORN. 

